Dear All,

We are using VMware Vcenter 6.5 with Data Protector 10.91.

As soon as we use option Use changed Block Tracking the session fails. With no option used - works well.

In the session report:

[Normal] From: VEPALIB_VMWARE@host "/LRM"  Time: 7/23/2024 11:57:21

      Virtual Machine 'x': Getting Changed Blocks for disk 'scsi0:0'.

[Critical] From: VEPALIB_VMWARE@host "/LRM"  Time: 7/23/2024 11:57:41

[172:517]          Virtual Machine 'x': Could not gather allocated blocks on disk scsi0:0...

[Critical] From: VEPALIB_VMWARE@host "/LRM"  Time: 7/23/2024 11:57:41

      Virtual Machine 'x': Could not backup disk scsi0:0 ...

In the debugs we see:

[ 99] 2024-07-23 11:28:30.233 ("/integ/vep/vepa/Plugins/Vmware/VmwareHelpers/DiskUtils/VixDiskLib.cpp $Rev: 2517 $ $Date:: 2009-10-28 16:12:58 ":230)

[ 99] <<=== (6) }  /* VixDiskLib::VixDiskLib_GetAllocatedBlocks */

[ 99] 

[ 20] [VddkUtil::queryAllocatedBlocks] Throwing exception: class VixDiskLibException

[ 99] 2024-07-23 11:28:30.264 ("/integ/vep/vepa/Plugins/Vmware/VmwareHelpers/DiskUtils/VddkUtil.cpp $Rev$ $Date::                      $:":1056)

[ 99] <<=== (5) }  /* VddkUtil::queryAllocatedBlocks */

[ 99] 

[ 20] [ChangeBlockTrackingUtil::getAllocatedBlocks] Exception Caught. Problem querying changed disk areas.

[ 20] [ChangeBlockTrackingUtil::getAllocatedBlocks] Throwing exception: class VepaException

[ 99] 2024-07-23 11:28:30.295 ("/integ/vep/vepa/Plugins/Vmware/VmwareHelpers/ChangeBlockTrackingUtil.cpp $Rev$ $Date::                      $:":247)

[ 99] <<=== (4) }  /* ChangeBlockTrackingUtil::getAllocatedBlocks */

[ 99] 

[ 20] [VirtualEnvironment::VirtualMachine::queryChangedAreasEx] Caught exception: Exception Caught. Problem querying changed disk areas...

[ 18] [EnvReadInt] OB2_VEAGENT_ALLOW_FALLBACK_QUERYCHANGEDDISKAREAS=n/a (default:0)

[ 20] [VirtualEnvironment::VirtualMachine::queryChangedAreasEx] Throwing exception: class CouldNotGetAllocatedBlocksException

[ 20] [BackupChangedBlocksStrategy::backupVmdk] CBT object is null.

[ 20] [BackupChangedBlocksStrategy::backupVmdk] CBT is REQUIRED. failing backup.

[ 20] [BackupChangedBlocksStrategy::backupVmdk] Throwing exception: class CouldNotBackupItemException

[ 20] [BackupChangedBlocksStrategy::backupVmdk] Could not backup object scsi0:0

Any experience with the above? Is it Vmware issue or DP one? Would appreciate any advises what to check.

Thank you!